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17 January, 07:39

Find f (-2) for f (x) = 2 (4) ^x

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Answers (2)
  1. 17 January, 08:22
    0
    1/8

    Explanation:

    Evaluate 2 4^x where x = - 2:

    2*4^x = 2/4^2

    4^2 = 16:

    2/16

    The gcd of 2 and 16 is 2, so 2/16 = (2*1) / (2*8) = 2/2*1/8 = 1/8:

    Answer: 1/8
  2. 17 January, 10:45
    0
    0.125

    Explanation:

    =2 (4) ^ (-2) = 2 (0.0625) = 0.125
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